1. Dissolution of Stainless Steel in Artificial Saliva.
- Author
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Lakatos-Varsányi, Magda, Wegrelius, Lena, and Olefjord, Ingemar
- Subjects
STAINLESS steel ,ALLOYS ,CORROSION resistant materials ,SALIVA ,BODY fluids ,EXOCRINE secretions ,MOUTH - Abstract
Dissolution of stainless steel type 304 in artificial saliva was studied by electrochemical methods, electron spectroscopy for chemical analysis, and atom absorption spectroscopy. The samples were polarized in the -400 mV (saturated calomel electrode) to -50mV (saturated calomel electrode) range. The total thickness of the passive film was found to be 25 ± 3 Å, independent of the potential. The passive film consists of a duplex structure: an inner layer of (Cr
0.5 Fe0.5 )2 O3 and an outer layer of a mixture of Cr(OH)3 and (Crx Fey )PO4 ·2H2 O. The analysis indicated that 11 µg/cm² of the alloying elements were dissolved during exposure for 1 year. [ABSTRACT FROM AUTHOR]- Published
- 1997